Example of a non-filleted pole (left) and a filleted pole (right)

It is common to find a fillet where two parts are welded together

In mechanical engineering, a fillet (pronounced ['fɪlɪt]) is a concave easing of an interior corner of a part design. A chamfer is similar to a fillet. Image File history File links Size of this preview: 800 × 600 pixelsFull resolution (1024 × 768 pixel, file size: 32 KB, MIME type: image/jpeg) Other versions Originally from en. ... Image File history File links Size of this preview: 800 × 600 pixelsFull resolution (1024 × 768 pixel, file size: 32 KB, MIME type: image/jpeg) Other versions Originally from en. ... Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... Mechanical engineering is an engineering discipline that involves the application of principles of physics for analysis, design, manufacturing, and maintenance of mechanical systems. ... Articles with similar titles include the NATO phonetic alphabet, which has also informally been called the “International Phonetic Alphabet”. For information on how to read IPA transcriptions of English words, see IPA chart for English. ... In calculus, a differentiable function f is convex on an interval if its derivative function f ′ is increasing on that interval: a convex function has an increasing slope. ... Example of a chamfer A Chamfer is a beveled edge connecting two surfaces. ...

Applications

• Stress concentration is a problem of load-bearing mechanical parts which is reduced by employing fillets on points and lines of expected high stress. These features effectively make the parts more durable and capable of bearing larger loads.
• For considerations in aerodynamics, fillets are employed to reduce interference drag where aircraft components such as wings, struts, and other surfaces meet one another.
• For manufacturing, concave corners are sometimes filleted to allow the use of round-tipped end mills to cut out an area of a material. This has a cycle time benefit if the round mill is simultaneously being used to mill complex curved surfaces.

Figure 1  Stress tensor In physics, stress is the internal distribution of forces within a body that balance and react to the loads applied to it. ... This article does not cite any references or sources. ... In aerodynamics, interference drag is a component of parasitic drag which is caused by vortices. ... Several types of endmills An endmill is a type of Milling cutter, a cutting tool used in industrial milling applications. ...

Design process

Fillets can be quickly designed onto parts using 3d solid modeling engineering CAD software by invoking the function and picking edges of interest. Once these features are included in the CAD design of a part, they are often manufactured automatically using computer-numerical control. Solid modeling (or modelling) is the unambiguous representation of the solid parts of an object, that is, models of solid objects suitable for computer processing. ... CAD is a TLA that may stand for: Cadiz Railroad (AAR reporting mark CAD) Canadian dollar – ISO 4217-code Capital Adequacy Directive Card Acceptance Device Children of the Anachronistic Dynasty Computer-aided design Computer-aided detection (medical) Computer-aided diagnosis (medical) Computer-assisted dispatch Computer-assisted drafting Coronary artery disease... A CNC Turning Center A CNC Milling Machine The abbreviation CNC stands for computer numerical control, and refers specifically to a computer controller that reads G-code instructions and drives the machine tool, a powered mechanical device typically used to fabricate metal components by the selective removal of metal. ...

Different packages use different names for the same operations. Autodesk Inventor and Solidworks refer to both concave and convex rounded edges as fillets, while referring to angled cuts of edges and concave corners as chamfers. Unigraphics refers to concave and convex rounded edges as blends. Pro/Engineer refers to rounded edges simply as rounds. Other 3D solid modeling software programs outside of engineering, such as gameSpace, have similar functions. Autodesk Inventor is the 3D parametric solid modeling package produced by U.S.-based software company Autodesk. ... SolidWorks is a 3D CAD (computer-aided design) program that runs on Microsoft Windows and was developed by SolidWorks Corporation - now a subsidiary of Dassault Systèmes, S. A.. SolidWorks was introduced in 1993 as a competitor to CAD programs such as Pro/ENGINEER, SDRC I-DEAS (now Unigraphics NX... Unigraphics a CAD product from UGS. Now known as NX. ... Pro/ENGINEER (commonly referred to as Pro/E or ProE) is a 3D CAD parametric feature solid modeling software created by Parametric Technology Corporation (PTC). ...

Although a smooth edge connecting two simple flat features is generally simple for a computer to create and fast for a human user to specify, heavy use of fillets on complex geometry can overwhelm even the best CAD software. Experienced users of solid modeling software minimize the occurrence of these problems by planning ahead and maximizing their use of dimensioned sketches to predefine their curved surfaces, rather than using fillets.

External links

• Welding fillets